Critical severity10.0NVD Advisory· Published Nov 4, 2021· Updated Jun 17, 2026
CVE-2021-34795
CVE-2021-34795
Description
Multiple vulnerabilities in the web-based management interface of the Cisco Catalyst Passive Optical Network (PON) Series Switches Optical Network Terminal (ONT) could allow an unauthenticated, remote attacker to perform the following actions: Log in with a default credential if the Telnet protocol is enabled Perform command injection Modify the configuration For more information about these vulnerabilities, see the Details section of this advisory.
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Affected products
7- cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-1p_firmware:*:*:*:*:*:*:*:*Range: <1.1.1.14
- cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4p_firmware:*:*:*:*:*:*:*:*Range: <1.1.3.17
- cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4pv_firmware:*:*:*:*:*:*:*:*Range: <1.1.3.17
- cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4pvc_firmware:*:*:*:*:*:*:*:*Range: <1.1.3.17
- cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4tvcw_firmware:*:*:*:*:*:*:*:*Range: <1.1.3.17
- Range: n/a
Patches
Vulnerability mechanics
References
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